Synthesis and Electroluminescent Properties of New Amorphous Cyclohexyl- and Hexyl-substituted Ter(9,9-dialkylfluorene)s
作者:Eunhee Lim、Byung-Jun Jung、Sung Min Kim、Bong Ok Kim、Hong-Ku Shim
DOI:10.1246/cl.2008.686
日期:2008.7.5
A series of ter(9,9-dialkylfluorene)s (TFs) containing cyclohexyl and hexyl side groups has been synthesized via the Suzuki coupling reaction. Their chemical structures were characterized by 1H NMR and 13C NMR. All TFs were soluble in common organic solvents and showed good thermal stability up to 400 °C. In particular, T(CHC)F composed of two 9,9-bis(cyclohexylmethyl)fluorenes and one dihexylfluorene showed improved thermal stability over T(HHH)F and was found to be amorphous, unlikely with T(CCC)F. A light-emitting diode device fabricated with an ITO/2-TNATA/NPB/TFs/Alq3/Liq/Al configuration exhibited blue light emission with EL maxima at 450 nm and EL efficiency of 1.1 cd/A.
一系列含有环己基和六基侧基的9,9-二烷基萘烯(TFs)通过铃木偶联反应合成。它们的化学结构通过1H NMR和13C NMR进行了表征。所有TFs在常见有机溶剂中均可溶,并且在高达400°C的温度下具有良好的热稳定性。特别是,T(CHC)F由两个9,9-二(cyclohexylmethyl)萘烯和一个二六基萘烯组成,其热稳定性优于T(HHH)F,并且被发现是无定形的,这与T(CCC)F相反。采用ITO/2-TNATA/NPB/TFs/Alq3/Liq/Al结构制造的发光二极管设备展示了蓝光发射,EL最大值在450 nm,EL效率为1.1 cd/A。